From mboxrd@z Thu Jan  1 00:00:00 1970
From: Roman Mamedov <rm@romanrm.ru>
Subject: Re: Performance question, RAID5
Date: Sun, 30 Jan 2011 17:15:33 +0500
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On Sun, 30 Jan 2011 12:09:02 +0000
Mathias Bur=C3=A9n <mathias.buren@gmail.com> wrote:

> Right, it's just that I don't want to destroy my data. I've ran a few
> bonnie++ benchmarks with different mount options though. You can find
> them here: http://stuff.dyndns.org/logs/bonnie_results.html
> It actually looks like stripe=3D384 helped performance a bit. Currently
> retrying the same mount options but with 32MB stripe cache instead of
> 8MB.

Be aware that it's not just 32MB of RAM, it's
 =20
  "stripe_cache_size * 4096 (page size) * number of disks".

In other words on 6 disks this stripe cache will consume 768 MB of RAM.

--=20
With respect,
Roman

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